$ git clone -n https://src.fedoraproject.org/rpms/mepack.git /var/lib/mock/f38-build-side-42-init-devel-997696-29140/root/chroot_tmpdir/scmroot/mepack
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-997696-29140/root/chroot_tmpdir/scmroot/mepack'...
$ git fetch origin cbc6b6a1c0fd6c066022d649afbb95e3e885ae04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mepack
 * [new ref]         cbc6b6a1c0fd6c066022d649afbb95e3e885ae04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbc6b6a Fix moduledir path