$ git clone -n https://src.fedoraproject.org/rpms/credentials-fetcher.git /var/lib/mock/f39-build-2348425-60143/root/chroot_tmpdir/scmroot/credentials-fetcher
Cloning into '/var/lib/mock/f39-build-2348425-60143/root/chroot_tmpdir/scmroot/credentials-fetcher'...
$ git fetch origin 78116b3ec74107457c1ced85dc414cf9f7abaed6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/credentials-fetcher
 * [new ref]         78116b3ec74107457c1ced85dc414cf9f7abaed6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78116b3 rebuild for abseil