$ git clone -n https://src.fedoraproject.org/rpms/vimb.git /var/lib/mock/f38-build-side-42-init-devel-830007-28366/root/chroot_tmpdir/scmroot/vimb
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-830007-28366/root/chroot_tmpdir/scmroot/vimb'...
$ git fetch origin 188fd0940dc11db5378cd3579a0edc0c2cc038ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vimb
 * [new ref]         188fd0940dc11db5378cd3579a0edc0c2cc038ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 188fd09 Initial import (fedora#2176206)