$ git clone -n https://src.fedoraproject.org/rpms/rust-grep-pcre2.git /var/lib/mock/f39-build-1534544-36233/root/chroot_tmpdir/scmroot/rust-grep-pcre2
Cloning into '/var/lib/mock/f39-build-1534544-36233/root/chroot_tmpdir/scmroot/rust-grep-pcre2'...
$ git fetch origin a642d297b0fb83c5f1ddfa4d83f690c0011adb7a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-grep-pcre2
 * [new ref]         a642d297b0fb83c5f1ddfa4d83f690c0011adb7a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a642d29 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild