$ git clone -n https://src.fedoraproject.org/rpms/rust-zune-jpeg.git /var/lib/mock/f45-build-46378-834/root/chroot_tmpdir/scmroot/rust-zune-jpeg
Cloning into '/var/lib/mock/f45-build-46378-834/root/chroot_tmpdir/scmroot/rust-zune-jpeg'...
$ git fetch origin 20e50ccae5cf5341e11306791d4581810ea21057:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zune-jpeg
 * [new ref]         20e50ccae5cf5341e11306791d4581810ea21057 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20e50cc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild