$ git clone -n https://src.fedoraproject.org/rpms/fim.git /var/lib/mock/f38-build-side-42-init-devel-817841-28339/root/chroot_tmpdir/scmroot/fim
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-817841-28339/root/chroot_tmpdir/scmroot/fim'...
$ git fetch origin 5e03f09355877d4bb9f8f0d4cd2028fc4a3a1ac9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fim
 * [new ref]         5e03f09355877d4bb9f8f0d4cd2028fc4a3a1ac9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e03f09 Initial import (fedora#2176131).