$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Vars.git /var/lib/mock/f39-build-1758533-41485/root/chroot_tmpdir/scmroot/perl-Test-Vars
Cloning into '/var/lib/mock/f39-build-1758533-41485/root/chroot_tmpdir/scmroot/perl-Test-Vars'...
$ git fetch origin a039fda218e4b5379c978bc223be03d04de1c736:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Vars
 * [new ref]         a039fda218e4b5379c978bc223be03d04de1c736 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a039fda Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild