$ git clone -n https://src.fedoraproject.org/rpms/apostrophe.git /var/lib/mock/f40-build-1990854-43431/root/chroot_tmpdir/scmroot/apostrophe
Cloning into '/var/lib/mock/f40-build-1990854-43431/root/chroot_tmpdir/scmroot/apostrophe'...
$ git fetch origin 90961c828924460f91bd1d048d2e57a92fc5ba93:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apostrophe
 * [new ref]         90961c828924460f91bd1d048d2e57a92fc5ba93 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90961c8 build: Add Packit config