$ git clone -n https://src.fedoraproject.org/rpms/xmountains.git /var/lib/mock/f45-build-38982-731/root/chroot_tmpdir/scmroot/xmountains
Cloning into '/var/lib/mock/f45-build-38982-731/root/chroot_tmpdir/scmroot/xmountains'...
$ git fetch origin 6ed9da79114e283eb6180c449fa939482e414bfd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmountains
 * [new ref]         6ed9da79114e283eb6180c449fa939482e414bfd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ed9da7 Drop ix86 on F45 unavoidably as imake stopped supporting on ix86