$ git clone -n https://src.fedoraproject.org/rpms/gummi.git /var/lib/mock/f42-build-3339785-41426/root/chroot_tmpdir/scmroot/gummi
Cloning into '/var/lib/mock/f42-build-3339785-41426/root/chroot_tmpdir/scmroot/gummi'...
$ git fetch origin 7ef06dc5384bf2e15d0a7df67d3a2bf926e0be79:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gummi
 * [new ref]         7ef06dc5384bf2e15d0a7df67d3a2bf926e0be79 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ef06dc Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild