$ git clone -n https://src.fedoraproject.org/rpms/cinnamon-desktop.git /var/lib/mock/f40-build-774005-127559/root/chroot_tmpdir/scmroot/cinnamon-desktop
Cloning into '/var/lib/mock/f40-build-774005-127559/root/chroot_tmpdir/scmroot/cinnamon-desktop'...
$ git fetch origin 58b7de28d6d2eacfd5d8a57aac4c9a1245831e72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cinnamon-desktop
 * [new ref]         58b7de28d6d2eacfd5d8a57aac4c9a1245831e72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 58b7de2 Add buildrequires python3-packaging