$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Regexp.git /var/lib/mock/f40-build-2309139-57338/root/chroot_tmpdir/scmroot/perl-Test-Regexp
Cloning into '/var/lib/mock/f40-build-2309139-57338/root/chroot_tmpdir/scmroot/perl-Test-Regexp'...
$ git fetch origin 78222e698d98b33617d21a6edff54a60bb5fd7e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Regexp
 * [new ref]         78222e698d98b33617d21a6edff54a60bb5fd7e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78222e6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild