$ git clone -n https://src.fedoraproject.org/rpms/rust-getrandom0.2.git /var/lib/mock/f43-build-59238711-6572183/root/chroot_tmpdir/scmroot/rust-getrandom0.2
Cloning into '/var/lib/mock/f43-build-59238711-6572183/root/chroot_tmpdir/scmroot/rust-getrandom0.2'...
$ git fetch origin c14fe4286bbb2073ba0b3f9ae9c175db252d0e81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-getrandom0.2
 * [new ref]         c14fe4286bbb2073ba0b3f9ae9c175db252d0e81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c14fe42 Update to version 0.2.16