$ git clone -n https://src.fedoraproject.org/rpms/erlang-p1_oauth2.git /var/lib/mock/f41-build-749624-13378/root/chroot_tmpdir/scmroot/erlang-p1_oauth2
Cloning into '/var/lib/mock/f41-build-749624-13378/root/chroot_tmpdir/scmroot/erlang-p1_oauth2'...
$ git fetch origin f4c15b9a227a84544d074408b2f8e2cd14b3c801:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-p1_oauth2
 * [new ref]         f4c15b9a227a84544d074408b2f8e2cd14b3c801 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4c15b9 Spec-file cleanup