$ git clone -n https://src.fedoraproject.org/rpms/byebyebios.git /var/lib/mock/f39-build-1972447-43325/root/chroot_tmpdir/scmroot/byebyebios
Cloning into '/var/lib/mock/f39-build-1972447-43325/root/chroot_tmpdir/scmroot/byebyebios'...
$ git fetch origin ed19076fc62112c57030fc3061529bb707d51c4c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/byebyebios
 * [new ref]         ed19076fc62112c57030fc3061529bb707d51c4c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed19076 Initial import after review