$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-RegExp.git /var/lib/mock/f39-build-1439873-32293/root/chroot_tmpdir/scmroot/perl-XML-RegExp
Cloning into '/var/lib/mock/f39-build-1439873-32293/root/chroot_tmpdir/scmroot/perl-XML-RegExp'...
$ git fetch origin 13f5c904a4fe12ecf33686b38f725c37fa2c975c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-RegExp
 * [new ref]         13f5c904a4fe12ecf33686b38f725c37fa2c975c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13f5c90 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild