$ git clone -n https://src.fedoraproject.org/rpms/simple-scan.git /var/lib/mock/f45-build-36079-701/root/chroot_tmpdir/scmroot/simple-scan
Cloning into '/var/lib/mock/f45-build-36079-701/root/chroot_tmpdir/scmroot/simple-scan'...
$ git fetch origin ec007b7cefa37aa2be1e88e2dcb980960773d315:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/simple-scan
 * [new ref]         ec007b7cefa37aa2be1e88e2dcb980960773d315 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec007b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild