$ git clone -n https://src.fedoraproject.org/rpms/golang-github-robfig-cron.git /var/lib/mock/f40-build-2055859-49119/root/chroot_tmpdir/scmroot/golang-github-robfig-cron
Cloning into '/var/lib/mock/f40-build-2055859-49119/root/chroot_tmpdir/scmroot/golang-github-robfig-cron'...
$ git fetch origin 2d3f137f86ab451d61e9a008f788acb16940668d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-robfig-cron
 * [new ref]         2d3f137f86ab451d61e9a008f788acb16940668d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d3f137 Migrated to SPDX license