$ git clone -n https://src.fedoraproject.org/rpms/vrms-rpm.git /var/lib/mock/f40-build-2044931-48756/root/chroot_tmpdir/scmroot/vrms-rpm
Cloning into '/var/lib/mock/f40-build-2044931-48756/root/chroot_tmpdir/scmroot/vrms-rpm'...
$ git fetch origin 5305c94dc5d4ef0d6809b17910ca84cd421fb3a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vrms-rpm
 * [new ref]         5305c94dc5d4ef0d6809b17910ca84cd421fb3a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5305c94 Update to v2.3