$ git clone -n https://src.fedoraproject.org/rpms/bubblemail.git /var/lib/mock/f45-build-4212-331/root/chroot_tmpdir/scmroot/bubblemail
Cloning into '/var/lib/mock/f45-build-4212-331/root/chroot_tmpdir/scmroot/bubblemail'...
$ git fetch origin 56ca38f69a3f9212380fdffaf968907a492d44cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bubblemail
 * [new ref]         56ca38f69a3f9212380fdffaf968907a492d44cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56ca38f Rebuilt for libedataserver 3.61.2