$ git clone -n https://src.fedoraproject.org/rpms/perl-Git-Repository.git /var/lib/mock/f40-build-2624653-65099/root/chroot_tmpdir/scmroot/perl-Git-Repository
Cloning into '/var/lib/mock/f40-build-2624653-65099/root/chroot_tmpdir/scmroot/perl-Git-Repository'...
$ git fetch origin 78b04e7f6ae64271632e92d4c6de4d1f5f880282:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Git-Repository
 * [new ref]         78b04e7f6ae64271632e92d4c6de4d1f5f880282 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78b04e7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild