$ git clone -n https://src.fedoraproject.org/rpms/borgmatic.git /var/lib/mock/f39-build-1776043-41522/root/chroot_tmpdir/scmroot/borgmatic
Cloning into '/var/lib/mock/f39-build-1776043-41522/root/chroot_tmpdir/scmroot/borgmatic'...
$ git fetch origin 460926e808005e30fb64037919387d0a0536bac6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/borgmatic
 * [new ref]         460926e808005e30fb64037919387d0a0536bac6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 460926e update to 1.8.5