$ git clone -n https://src.fedoraproject.org/rpms/evolution-data-server.git /var/lib/mock/f40-build-2094997-50371/root/chroot_tmpdir/scmroot/evolution-data-server
Cloning into '/var/lib/mock/f40-build-2094997-50371/root/chroot_tmpdir/scmroot/evolution-data-server'...
$ git fetch origin 68be1c4af7dd3a71aeb94ece2b4f50dfa803a2c4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/evolution-data-server
 * [new ref]         68be1c4af7dd3a71aeb94ece2b4f50dfa803a2c4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68be1c4 Backport upstream patch to fix C issue in CMake probing