$ git clone -n https://src.fedoraproject.org/rpms/dosfstools.git /var/lib/mock/f42-build-867425-175505/root/chroot_tmpdir/scmroot/dosfstools
Cloning into '/var/lib/mock/f42-build-867425-175505/root/chroot_tmpdir/scmroot/dosfstools'...
$ git fetch origin 19897a69b5ea73fad624d2661ecf687b54981291:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dosfstools
 * [new ref]         19897a69b5ea73fad624d2661ecf687b54981291 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19897a6 Rebuilt for the bin-sbin merge (2nd attempt)