$ git clone -n https://src.fedoraproject.org/rpms/rust-httpdate.git /var/lib/mock/f39-build-1521776-35857/root/chroot_tmpdir/scmroot/rust-httpdate
Cloning into '/var/lib/mock/f39-build-1521776-35857/root/chroot_tmpdir/scmroot/rust-httpdate'...
$ git fetch origin 45dad849523a571f14649f5307ab8f6e09b948dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-httpdate
 * [new ref]         45dad849523a571f14649f5307ab8f6e09b948dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45dad84 Update to version 1.0.3; Fixes RHBZ#2231707