$ git clone -n https://src.fedoraproject.org/rpms/blis.git /var/lib/mock/f45-build-4880-336/root/chroot_tmpdir/scmroot/blis
Cloning into '/var/lib/mock/f45-build-4880-336/root/chroot_tmpdir/scmroot/blis'...
$ git fetch origin f9d2e2d640a684404327af410c4b49143dcc60a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/blis
 * [new ref]         f9d2e2d640a684404327af410c4b49143dcc60a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9d2e2d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild