$ git clone -n https://src.fedoraproject.org/rpms/perl-PBKDF2-Tiny.git /var/lib/mock/f40-build-2019988-46583/root/chroot_tmpdir/scmroot/perl-PBKDF2-Tiny
Cloning into '/var/lib/mock/f40-build-2019988-46583/root/chroot_tmpdir/scmroot/perl-PBKDF2-Tiny'...
$ git fetch origin f2a461e975b59cde651cb87b43ac3f19489bfcf4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PBKDF2-Tiny
 * [new ref]         f2a461e975b59cde651cb87b43ac3f19489bfcf4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2a461e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild