$ git clone -n https://src.fedoraproject.org/rpms/perl-Proc-Guard.git /var/lib/mock/f39-build-1439203-32235/root/chroot_tmpdir/scmroot/perl-Proc-Guard
Cloning into '/var/lib/mock/f39-build-1439203-32235/root/chroot_tmpdir/scmroot/perl-Proc-Guard'...
$ git fetch origin b36340c812668d63951776253ad387a17d7dd1b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Proc-Guard
 * [new ref]         b36340c812668d63951776253ad387a17d7dd1b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b36340c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild