$ git clone -n https://src.fedoraproject.org/rpms/maven-doxia-sitetools.git /var/lib/mock/f42-build-3360758-45036/root/chroot_tmpdir/scmroot/maven-doxia-sitetools
Cloning into '/var/lib/mock/f42-build-3360758-45036/root/chroot_tmpdir/scmroot/maven-doxia-sitetools'...
$ git fetch origin a915af0b053fbd54d93cd48ac112c0a3495032e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-doxia-sitetools
 * [new ref]         a915af0b053fbd54d93cd48ac112c0a3495032e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a915af0 Version 2.0.0