$ git clone -n https://src.fedoraproject.org/rpms/gumbo-parser.git /var/lib/mock/f45-build-13258-448/root/chroot_tmpdir/scmroot/gumbo-parser
Cloning into '/var/lib/mock/f45-build-13258-448/root/chroot_tmpdir/scmroot/gumbo-parser'...
$ git fetch origin e005889eb9953c94cee44de8e26c238d2f1674f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gumbo-parser
 * [new ref]         e005889eb9953c94cee44de8e26c238d2f1674f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e005889 0.14.0