$ git clone -n https://src.fedoraproject.org/rpms/hercstudio.git /var/lib/mock/f41-build-1021579-18027/root/chroot_tmpdir/scmroot/hercstudio
Cloning into '/var/lib/mock/f41-build-1021579-18027/root/chroot_tmpdir/scmroot/hercstudio'...
$ git fetch origin 6d331d1f181c800f2e2747cdee7a3c3e71e60e8f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hercstudio
 * [new ref]         6d331d1f181c800f2e2747cdee7a3c3e71e60e8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d331d1 Eliminate use of obsolete %patchN syntax (#2283636)