$ git clone -n https://src.fedoraproject.org/rpms/perl-Signal-Mask.git /var/lib/mock/f39-build-1434875-31958/root/chroot_tmpdir/scmroot/perl-Signal-Mask
Cloning into '/var/lib/mock/f39-build-1434875-31958/root/chroot_tmpdir/scmroot/perl-Signal-Mask'...
$ git fetch origin 3cb6b01bf55e6c226c66b9b1e72b77eee032e35f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Signal-Mask
 * [new ref]         3cb6b01bf55e6c226c66b9b1e72b77eee032e35f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cb6b01 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild