$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-TrailingSpace.git /var/lib/mock/f39-build-1435214-31977/root/chroot_tmpdir/scmroot/perl-Test-TrailingSpace
Cloning into '/var/lib/mock/f39-build-1435214-31977/root/chroot_tmpdir/scmroot/perl-Test-TrailingSpace'...
$ git fetch origin b4b4c7be586eb19609a854243a4144fe5a8b3685:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-TrailingSpace
 * [new ref]         b4b4c7be586eb19609a854243a4144fe5a8b3685 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4b4c7b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild