$ git clone -n https://src.fedoraproject.org/rpms/opensc.git /var/lib/mock/f41-build-side-1-3070143-38790/root/chroot_tmpdir/scmroot/opensc
Cloning into '/var/lib/mock/f41-build-side-1-3070143-38790/root/chroot_tmpdir/scmroot/opensc'...
$ git fetch origin 7745c9d28e8a54dfb54db430e1d3a87c636e57b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opensc
 * [new ref]         7745c9d28e8a54dfb54db430e1d3a87c636e57b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7745c9d opensc-0.25.1-5