$ git clone -n https://src.fedoraproject.org/rpms/fastfetch.git /var/lib/mock/f40-build-2663561-67008/root/chroot_tmpdir/scmroot/fastfetch
Cloning into '/var/lib/mock/f40-build-2663561-67008/root/chroot_tmpdir/scmroot/fastfetch'...
$ git fetch origin f2381114bbd9cbf66184546f913fdf6096d9364f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fastfetch
 * [new ref]         f2381114bbd9cbf66184546f913fdf6096d9364f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f238111 update sources