$ git clone -n https://src.fedoraproject.org/rpms/libntirpc.git /var/lib/mock/f45-build-16696-490/root/chroot_tmpdir/scmroot/libntirpc
Cloning into '/var/lib/mock/f45-build-16696-490/root/chroot_tmpdir/scmroot/libntirpc'...
$ git fetch origin 76c1fc24a0da197cf18576203d552bef81f4d1a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libntirpc
 * [new ref]         76c1fc24a0da197cf18576203d552bef81f4d1a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 76c1fc2 build in side-tag f45-build-side-146171