$ git clone -n https://src.fedoraproject.org/rpms/unicorn.git /var/lib/mock/f40-build-735105-106202/root/chroot_tmpdir/scmroot/unicorn
Cloning into '/var/lib/mock/f40-build-735105-106202/root/chroot_tmpdir/scmroot/unicorn'...
$ git fetch origin de9d9f1b5654a1939ccfa5b16a79e8959a64754d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unicorn
 * [new ref]         de9d9f1b5654a1939ccfa5b16a79e8959a64754d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de9d9f1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild