$ git clone -n https://src.fedoraproject.org/rpms/datovka.git /var/lib/mock/f41-build-side-1-2646037-27211/root/chroot_tmpdir/scmroot/datovka
Cloning into '/var/lib/mock/f41-build-side-1-2646037-27211/root/chroot_tmpdir/scmroot/datovka'...
$ git fetch origin a874e2d0daea086f3b5ee291b9de61f3b3ef3f42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/datovka
 * [new ref]         a874e2d0daea086f3b5ee291b9de61f3b3ef3f42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a874e2d New version