$ git clone -n https://src.fedoraproject.org/rpms/ed2k_hash.git /var/lib/mock/f45-build-7947-371/root/chroot_tmpdir/scmroot/ed2k_hash
Cloning into '/var/lib/mock/f45-build-7947-371/root/chroot_tmpdir/scmroot/ed2k_hash'...
$ git fetch origin f4d8c479b8fd46bc12a33ed353d63ce7036ee63b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ed2k_hash
 * [new ref]         f4d8c479b8fd46bc12a33ed353d63ce7036ee63b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4d8c47 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild