$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Run.git /var/lib/mock/f39-build-1486183-34463/root/chroot_tmpdir/scmroot/perl-Test-Run
Cloning into '/var/lib/mock/f39-build-1486183-34463/root/chroot_tmpdir/scmroot/perl-Test-Run'...
$ git fetch origin e78da7eb89eefed574e0e8ef2c228a5aeb663b98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Run
 * [new ref]         e78da7eb89eefed574e0e8ef2c228a5aeb663b98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e78da7e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild