$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-MockObject.git /var/lib/mock/f40-build-2021435-46718/root/chroot_tmpdir/scmroot/perl-Test-MockObject
Cloning into '/var/lib/mock/f40-build-2021435-46718/root/chroot_tmpdir/scmroot/perl-Test-MockObject'...
$ git fetch origin 8932a0c2ad20776e6d0c873d3761b26d4d0abfa4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-MockObject
 * [new ref]         8932a0c2ad20776e6d0c873d3761b26d4d0abfa4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8932a0c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild