$ git clone -n https://src.fedoraproject.org/rpms/toot.git /var/lib/mock/f39-build-1592113-38307/root/chroot_tmpdir/scmroot/toot
Cloning into '/var/lib/mock/f39-build-1592113-38307/root/chroot_tmpdir/scmroot/toot'...
$ git fetch origin 4fd9fa6033a3625ee79b75957918fb4267973add:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/toot
 * [new ref]         4fd9fa6033a3625ee79b75957918fb4267973add -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4fd9fa6 Update to 0.38.1