$ git clone -n https://src.fedoraproject.org/rpms/rubygem-sass.git /var/lib/mock/f45-build-35282-694/root/chroot_tmpdir/scmroot/rubygem-sass
Cloning into '/var/lib/mock/f45-build-35282-694/root/chroot_tmpdir/scmroot/rubygem-sass'...
$ git fetch origin 5aed978a7ed5547339e9ba7edff15cdda41e9ecb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-sass
 * [new ref]         5aed978a7ed5547339e9ba7edff15cdda41e9ecb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5aed978 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild