$ git clone -n https://src.fedoraproject.org/rpms/erlang-p1_pgsql.git /var/lib/mock/f41-build-side-1-3076451-38884/root/chroot_tmpdir/scmroot/erlang-p1_pgsql
Cloning into '/var/lib/mock/f41-build-side-1-3076451-38884/root/chroot_tmpdir/scmroot/erlang-p1_pgsql'...
$ git fetch origin ec77fcf39db63d05fb3584f5716a2f9650d5168c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-p1_pgsql
 * [new ref]         ec77fcf39db63d05fb3584f5716a2f9650d5168c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec77fcf p1_pgsql ver. 1.1.28