$ git clone -n https://src.fedoraproject.org/rpms/rust-typetag.git /var/lib/mock/f39-build-1562334-37432/root/chroot_tmpdir/scmroot/rust-typetag
Cloning into '/var/lib/mock/f39-build-1562334-37432/root/chroot_tmpdir/scmroot/rust-typetag'...
$ git fetch origin a37d03d299f03868d1249029c6d0955aeca04984:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-typetag
 * [new ref]         a37d03d299f03868d1249029c6d0955aeca04984 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a37d03d Update to version 0.2.13; Fixes RHBZ#2232476