$ git clone -n https://src.fedoraproject.org/rpms/merkuro.git /var/lib/mock/f42-build-871174-177477/root/chroot_tmpdir/scmroot/merkuro
Cloning into '/var/lib/mock/f42-build-871174-177477/root/chroot_tmpdir/scmroot/merkuro'...
$ git fetch origin bfe9f266161af83f5d46440ebc5e9e665e2061f3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/merkuro
 * [new ref]         bfe9f266161af83f5d46440ebc5e9e665e2061f3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bfe9f26 24.12.2