$ git clone -n https://src.fedoraproject.org/rpms/pack.git /var/lib/mock/f39-build-1848172-42173/root/chroot_tmpdir/scmroot/pack
Cloning into '/var/lib/mock/f39-build-1848172-42173/root/chroot_tmpdir/scmroot/pack'...
$ git fetch origin 6fe1f1147262d8e0d67fef2431651ee45e852fd1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pack
 * [new ref]         6fe1f1147262d8e0d67fef2431651ee45e852fd1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fe1f11 auto bump to v0.32.0