$ git clone -n https://src.fedoraproject.org/rpms/merkuro.git /var/lib/mock/f39-build-1927865-43062/root/chroot_tmpdir/scmroot/merkuro
Cloning into '/var/lib/mock/f39-build-1927865-43062/root/chroot_tmpdir/scmroot/merkuro'...
$ git fetch origin a3eedf97d0916153b856598ea76780ad42ef8135:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/merkuro
 * [new ref]         a3eedf97d0916153b856598ea76780ad42ef8135 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3eedf9 23.08.3