$ git clone -n https://src.fedoraproject.org/rpms/golang-x-tools.git /var/lib/mock/f38-build-side-42-init-devel-779504-27886/root/chroot_tmpdir/scmroot/golang-x-tools
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-779504-27886/root/chroot_tmpdir/scmroot/golang-x-tools'...
$ git fetch origin 8d53c531727d746160a3d7f9fe6efb32224ed088:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-x-tools
 * [new ref]         8d53c531727d746160a3d7f9fe6efb32224ed088 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d53c53 De-bootstrap