$ git clone -n https://src.fedoraproject.org/rpms/libmpeg2.git /var/lib/mock/f42-build-3272970-41309/root/chroot_tmpdir/scmroot/libmpeg2
Cloning into '/var/lib/mock/f42-build-3272970-41309/root/chroot_tmpdir/scmroot/libmpeg2'...
$ git fetch origin 30f6f27da27d636786f833bb997ded2085ea7c02:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmpeg2
 * [new ref]         30f6f27da27d636786f833bb997ded2085ea7c02 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30f6f27 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild