$ git clone -n https://src.fedoraproject.org/rpms/golang-github-remind101-migrate.git /var/lib/mock/f39-build-1513105-35589/root/chroot_tmpdir/scmroot/golang-github-remind101-migrate
Cloning into '/var/lib/mock/f39-build-1513105-35589/root/chroot_tmpdir/scmroot/golang-github-remind101-migrate'...
$ git fetch origin e5e29a277c0764643ba719672d59da168a31e524:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-remind101-migrate
 * [new ref]         e5e29a277c0764643ba719672d59da168a31e524 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e5e29a2 Fix FTBFS