$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-Brotli.git /var/lib/mock/f39-build-1885859-42779/root/chroot_tmpdir/scmroot/perl-Alien-Brotli
Cloning into '/var/lib/mock/f39-build-1885859-42779/root/chroot_tmpdir/scmroot/perl-Alien-Brotli'...
$ git fetch origin 50f765bc0fcacf9b4e82c30ca3878dbf1a78391a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-Brotli
 * [new ref]         50f765bc0fcacf9b4e82c30ca3878dbf1a78391a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50f765b Update for brotli 1.1.0