$ git clone -n https://src.fedoraproject.org/rpms/calamares.git /var/lib/mock/f40-build-782745-132275/root/chroot_tmpdir/scmroot/calamares
Cloning into '/var/lib/mock/f40-build-782745-132275/root/chroot_tmpdir/scmroot/calamares'...
$ git fetch origin aa29cd58824f82a6863b21b2aa0e66ce78a79a0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/calamares
 * [new ref]         aa29cd58824f82a6863b21b2aa0e66ce78a79a0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa29cd5 Update to 3.3.3