$ git clone -n https://src.fedoraproject.org/rpms/rubygem-actioncable.git /var/lib/mock/f39-build-2072909-49348/root/chroot_tmpdir/scmroot/rubygem-actioncable
Cloning into '/var/lib/mock/f39-build-2072909-49348/root/chroot_tmpdir/scmroot/rubygem-actioncable'...
$ git fetch origin 5b7bed2e24252111b91be6ce022c35d7acaa3338:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-actioncable
 * [new ref]         5b7bed2e24252111b91be6ce022c35d7acaa3338 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b7bed2 Update to actioncable 7.0.8.