$ git clone -n https://src.fedoraproject.org/rpms/python-s3transfer.git /var/lib/mock/f41-build-59098668-6571003/root/chroot_tmpdir/scmroot/python-s3transfer
Cloning into '/var/lib/mock/f41-build-59098668-6571003/root/chroot_tmpdir/scmroot/python-s3transfer'...
$ git fetch origin 1e30b3e6213b66697aafea774aaaa1bf901f9fd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-s3transfer
 * [new ref]         1e30b3e6213b66697aafea774aaaa1bf901f9fd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e30b3e 0.12.0