$ git clone -n https://src.fedoraproject.org/rpms/bluejay.git /var/lib/mock/f45-build-4281-331/root/chroot_tmpdir/scmroot/bluejay
Cloning into '/var/lib/mock/f45-build-4281-331/root/chroot_tmpdir/scmroot/bluejay'...
$ git fetch origin 6fe39a38d15cf1ee2f1dc2c3668001f4be9c40ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bluejay
 * [new ref]         6fe39a38d15cf1ee2f1dc2c3668001f4be9c40ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fe39a3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild