$ git clone -n https://src.fedoraproject.org/rpms/golang-github-sjmudd-stopwatch.git /var/lib/mock/f41-build-1036380-18724/root/chroot_tmpdir/scmroot/golang-github-sjmudd-stopwatch
Cloning into '/var/lib/mock/f41-build-1036380-18724/root/chroot_tmpdir/scmroot/golang-github-sjmudd-stopwatch'...
$ git fetch origin 48def56df820e18548511f222a0fcaa642d083cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-sjmudd-stopwatch
 * [new ref]         48def56df820e18548511f222a0fcaa642d083cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48def56 Fix FTBFS