$ git clone -n https://src.fedoraproject.org/rpms/xbase.git /var/lib/mock/f45-build-38609-725/root/chroot_tmpdir/scmroot/xbase
Cloning into '/var/lib/mock/f45-build-38609-725/root/chroot_tmpdir/scmroot/xbase'...
$ git fetch origin 773a4879ad430acde631c6326f1af24045af57df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xbase
 * [new ref]         773a4879ad430acde631c6326f1af24045af57df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 773a487 opt-in to packit for rawhide