$ git clone -n https://src.fedoraproject.org/rpms/qbe.git /var/lib/mock/f45-build-33877-674/root/chroot_tmpdir/scmroot/qbe
Cloning into '/var/lib/mock/f45-build-33877-674/root/chroot_tmpdir/scmroot/qbe'...
$ git fetch origin 42f4270f7ffe34beefb99a41187c6b50b0205ac6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qbe
 * [new ref]         42f4270f7ffe34beefb99a41187c6b50b0205ac6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42f4270 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild