$ git clone -n https://src.fedoraproject.org/rpms/rust-kurbu5-kadm5-sys.git /var/lib/mock/f45-build-42796-796/root/chroot_tmpdir/scmroot/rust-kurbu5-kadm5-sys
Cloning into '/var/lib/mock/f45-build-42796-796/root/chroot_tmpdir/scmroot/rust-kurbu5-kadm5-sys'...
$ git fetch origin 63d4f29bab09f7316c48da2fec3ca2a3765ced93:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-kurbu5-kadm5-sys
 * [new ref]         63d4f29bab09f7316c48da2fec3ca2a3765ced93 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63d4f29 Update to version 0.1.4