$ git clone -n https://src.fedoraproject.org/rpms/hexchat.git /var/lib/mock/f45-build-13400-450/root/chroot_tmpdir/scmroot/hexchat
Cloning into '/var/lib/mock/f45-build-13400-450/root/chroot_tmpdir/scmroot/hexchat'...
$ git fetch origin c256d4389c1febeb43ece8f3373ce83e77c25c56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hexchat
 * [new ref]         c256d4389c1febeb43ece8f3373ce83e77c25c56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c256d43 Perl 5.44 rebuild