$ git clone -n https://src.fedoraproject.org/rpms/hyperestraier.git /var/lib/mock/f45-build-13864-455/root/chroot_tmpdir/scmroot/hyperestraier
Cloning into '/var/lib/mock/f45-build-13864-455/root/chroot_tmpdir/scmroot/hyperestraier'...
$ git fetch origin 0fff91d0ee24bb2ebaea9856e1357e5a8193a6e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hyperestraier
 * [new ref]         0fff91d0ee24bb2ebaea9856e1357e5a8193a6e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fff91d Perl 5.44 rebuild