$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-m4.git /var/lib/mock/f39-build-1910799-42872/root/chroot_tmpdir/scmroot/perl-Alien-m4
Cloning into '/var/lib/mock/f39-build-1910799-42872/root/chroot_tmpdir/scmroot/perl-Alien-m4'...
$ git fetch origin 2e369859cf4d6356ab979f4ef1a88756410694a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-m4
 * [new ref]         2e369859cf4d6356ab979f4ef1a88756410694a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e36985 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild