$ git clone -n https://src.fedoraproject.org/rpms/gitjacker.git /var/lib/mock/f40-build-1998603-44250/root/chroot_tmpdir/scmroot/gitjacker
Cloning into '/var/lib/mock/f40-build-1998603-44250/root/chroot_tmpdir/scmroot/gitjacker'...
$ git fetch origin 3f9360da16bbe2f1624706ab162233e46e73d957:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gitjacker
 * [new ref]         3f9360da16bbe2f1624706ab162233e46e73d957 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f9360d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild