$ git clone -n https://src.fedoraproject.org/rpms/evince.git /var/lib/mock/f42-build-side-1-3533251-46361/root/chroot_tmpdir/scmroot/evince
Cloning into '/var/lib/mock/f42-build-side-1-3533251-46361/root/chroot_tmpdir/scmroot/evince'...
$ git fetch origin 936c799f605765f2fcbd6b6ec9e59567cf412b35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/evince
 * [new ref]         936c799f605765f2fcbd6b6ec9e59567cf412b35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 936c799 Fix scaling in presentation mode with fractional scaling