$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-ebnfutil.git /var/lib/mock/f40-build-2240383-53637/root/chroot_tmpdir/scmroot/golang-modernc-ebnfutil
Cloning into '/var/lib/mock/f40-build-2240383-53637/root/chroot_tmpdir/scmroot/golang-modernc-ebnfutil'...
$ git fetch origin bc8901fbed8b2c5faf3d36927795af0da4e353e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-ebnfutil
 * [new ref]         bc8901fbed8b2c5faf3d36927795af0da4e353e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc8901f Initial import (fedora#2233182)