$ git clone -n https://src.fedoraproject.org/rpms/plasma-bigscreen.git /var/lib/mock/f40-build-2665541-67101/root/chroot_tmpdir/scmroot/plasma-bigscreen
Cloning into '/var/lib/mock/f40-build-2665541-67101/root/chroot_tmpdir/scmroot/plasma-bigscreen'...
$ git fetch origin 12abe8834affada059a83aba2f3b851b956df884:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-bigscreen
 * [new ref]         12abe8834affada059a83aba2f3b851b956df884 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12abe88 Bump for new depend sonames