$ git clone -n https://src.fedoraproject.org/rpms/visualboyadvance-m.git /var/lib/mock/f38-build-721712-98611/root/chroot_tmpdir/scmroot/visualboyadvance-m
Cloning into '/var/lib/mock/f38-build-721712-98611/root/chroot_tmpdir/scmroot/visualboyadvance-m'...
$ git fetch origin 7c72aa61e4196bcf4cc60e044469d13f0513ff04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/visualboyadvance-m
 * [new ref]         7c72aa61e4196bcf4cc60e044469d13f0513ff04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c72aa6 Update to 2.1.5