$ git clone -n https://src.fedoraproject.org/rpms/arm-none-eabi-gcc-cs.git /var/lib/mock/f41-build-58828443-6568428/root/chroot_tmpdir/scmroot/arm-none-eabi-gcc-cs
Cloning into '/var/lib/mock/f41-build-58828443-6568428/root/chroot_tmpdir/scmroot/arm-none-eabi-gcc-cs'...
$ git fetch origin fa08ac1d1820b34cd4bab9394cab2c50292b95cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arm-none-eabi-gcc-cs
 * [new ref]         fa08ac1d1820b34cd4bab9394cab2c50292b95cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa08ac1 rebuild for new arm-none-eabi-newlib