$ git clone -n https://src.fedoraproject.org/rpms/messagelib.git /var/lib/mock/f41-build-856032-167435/root/chroot_tmpdir/scmroot/messagelib
Cloning into '/var/lib/mock/f41-build-856032-167435/root/chroot_tmpdir/scmroot/messagelib'...
$ git fetch origin debe885ebca7ec3115eac5daf2e1fc3154cd922c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/messagelib
 * [new ref]         debe885ebca7ec3115eac5daf2e1fc3154cd922c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at debe885 24.08.2