$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk0.15.git /var/lib/mock/f40-build-2183151-51244/root/chroot_tmpdir/scmroot/rust-gdk0.15
Cloning into '/var/lib/mock/f40-build-2183151-51244/root/chroot_tmpdir/scmroot/rust-gdk0.15'...
$ git fetch origin 85bf0238d39f85bcc9c5bdfb03b56364024ac19f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk0.15
 * [new ref]         85bf0238d39f85bcc9c5bdfb03b56364024ac19f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85bf023 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild