$ git clone -n https://src.fedoraproject.org/rpms/perl-Thread-SigMask.git /var/lib/mock/f42-build-876494-179713/root/chroot_tmpdir/scmroot/perl-Thread-SigMask
Cloning into '/var/lib/mock/f42-build-876494-179713/root/chroot_tmpdir/scmroot/perl-Thread-SigMask'...
$ git fetch origin 295155ef6b1d633d90ade3e9bc3cd5afc2f855f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Thread-SigMask
 * [new ref]         295155ef6b1d633d90ade3e9bc3cd5afc2f855f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 295155e Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild