$ git clone -n https://src.fedoraproject.org/rpms/xmlstarlet.git /var/lib/mock/f40-build-755737-118314/root/chroot_tmpdir/scmroot/xmlstarlet
Cloning into '/var/lib/mock/f40-build-755737-118314/root/chroot_tmpdir/scmroot/xmlstarlet'...
$ git fetch origin 2d84f4f62d2f7b6ce90b32c9802049c7246fe8e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmlstarlet
 * [new ref]         2d84f4f62d2f7b6ce90b32c9802049c7246fe8e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d84f4f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild