$ git clone -n https://src.fedoraproject.org/rpms/fastfetch.git /var/lib/mock/f40-build-1858784-24992/root/chroot_tmpdir/scmroot/fastfetch
Cloning into '/var/lib/mock/f40-build-1858784-24992/root/chroot_tmpdir/scmroot/fastfetch'...
$ git fetch origin b6123bfc877a3b00ad579fa78ec39deb44250446:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fastfetch
 * [new ref]         b6123bfc877a3b00ad579fa78ec39deb44250446 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6123bf update to 2.20.0