$ git clone -n https://src.fedoraproject.org/rpms/archlinux-keyring.git /var/lib/mock/f39-build-1582051-38102/root/chroot_tmpdir/scmroot/archlinux-keyring
Cloning into '/var/lib/mock/f39-build-1582051-38102/root/chroot_tmpdir/scmroot/archlinux-keyring'...
$ git fetch origin 5f378db399c9a8166b2a0fd26f23a3c2b52765d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/archlinux-keyring
 * [new ref]         5f378db399c9a8166b2a0fd26f23a3c2b52765d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f378db Version 20231026