$ git clone -n https://src.fedoraproject.org/rpms/golang-github-kardianos-osext.git /var/lib/mock/f40-build-2246112-53800/root/chroot_tmpdir/scmroot/golang-github-kardianos-osext
Cloning into '/var/lib/mock/f40-build-2246112-53800/root/chroot_tmpdir/scmroot/golang-github-kardianos-osext'...
$ git fetch origin f3979c2bc5399dac29545a1a60de926e265da4ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-kardianos-osext
 * [new ref]         f3979c2bc5399dac29545a1a60de926e265da4ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3979c2 Remove deprecated %patchN syntax